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View Product Reviews115mm Celotex Thermaclass Cavity Wall 21 Full Fill Insulation Board T&G 1190mm x 450mm (2.68m2/Pack)
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Product Overview
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Delivery & Returns Information
All delivery charges are shown in your basket and are dependent on the total value of items in your basket based on product category.
This charge is based on delivery to mainland UK excluding the following postcodes: AB, DD, KW, IV, LD, LL, PH, SA and SY. If your delivery address is in any of these postcode areas a member of our customer service team will contact you prior to processing your order should an additional delivery charge apply. We do not offer deliveries outside the UK mainland.
Standard (Nationwide) Delivery
| Insulation, Plasterboard and Drylining Products | ||
|---|---|---|
| ORDER VALUE | DELIVERY CHARGE | |
| Under £150 | £50 ex. VAT | |
| Between £150 - £400 ex. VAT | £35 ex. VAT | |
| Over £400 ex. VAT | FREE | |
| Timber & Sheet, Building Materials, Joinery and Gardens & Landscaping Products | ||
| ORDER VALUE | DELIVERY CHARGE | |
| Under £100 | £25 ex. VAT | |
| Between £100 - £250 ex. VAT | £20 ex. VAT | |
| Over £250 ex. VAT | FREE | |
| SuperFOIL and YBS products | ||
| ORDER VALUE | DELIVERY CHARGE | |
| Each item | £10 ex. VAT | |
| Over £350 ex. VAT of 1 brand | FREE | |
| Paving Stone Products | ||
| DELIVERY CHARGE | ||
| FREE | ||
| Screws & Fixings and Adhesives & Sealants | ||
| ORDER VALUE | DELIVERY CHARGE | |
| Under £100 | £7.50 ex. VAT | |
| Over £100 ex. VAT | FREE | |
| Thermafleece CosyWool Roll & SupaSoft Insulation | ||
| QUANTITY | DELIVERY CHARGE | |
| 1 | £30 ex. VAT | |
| 2 | £60 ex. VAT | |
| 3 to 12 | £70 ex. VAT | |
| 13 to 24 | £140 ex. VAT | |
| 25 to 36 | £210 ex. VAT | |
| 37 to 48 | £280 ex. VAT | |
| 49 to 60 | £350 ex. VAT | |
| 61+ | £420 ex. VAT | |
| Thermafleece CosyWool Slab, Thermafleece UltraWool & Thermafleece NatraHemp | ||
| QUANTITY | DELIVERY CHARGE | |
| 1 | £30 ex. VAT | |
| 2 | £60 ex. VAT | |
| 3 to 4 | £70 ex. VAT | |
| 5 to 8 | £140 ex. VAT | |
| 9 to 12 | £210 ex. VAT | |
| 13 to 16 | £280 ex. VAT | |
| 17 to 20 | £350 ex. VAT | |
| 21+ | £420 ex. VAT | |
| Block Pavers | ||
| ORDER VALUE | DELIVERY CHARGE | |
| Under £100 | £17.50 ex. VAT | |
| Between £100 - £200 ex. VAT | £30.50 ex. VAT | |
| Between £200 - £900 ex. VAT | £105 ex. VAT | |
| Over £900 ex. VAT | FREE | |
| Artificial Grass | ||
| ORDER VALUE | DELIVERY CHARGE | |
| Under £100 | £12 ex. VAT | |
| Between £100 - £200 ex. VAT | £16.50 ex. VAT | |
| Over £200 ex. VAT | £22 ex. VAT | |
| Doors and Feature Panelling | ||
| QUANTITY | DELIVERY CHARGE | |
| 1 to 2 | £35 ex. VAT | |
| 3 to 4 | £45 ex. VAT | |
| 5+ | £60 ex. VAT | |
|
* Deliveries of Doors and Panels to Scotland may incur additional costs and may have an extended delivery time of an additional 3 working days. Delivery to the postcodes below will be charged an additional delivery fee. Our customer service team will reach out to you if you order requires an additional delivery charge. This will be calculated based on the difference between the standard cost charged and the total cost outlined below:
Postcodes: KA1-29, IV1-39, AB, PH1-41, DD, PA1-19, KY, FK, FK15-21 - £90 ex VAT (total delivery cost) |
||
| Ironmongery | ||
| DELIVERY CHARGE | ||
| 1+ | £16.50 ex. VAT | |
Express Delivery
| Express Delivery - Insulation and Plasterboard & Drylining | |
|---|---|
| ORDER VALUE | DELIVERY CHARGE |
| Under £400 | £50 ex. VAT |
| Over £400 ex. VAT | £35 ex. VAT |
| Express Delivery - Timber & Sheet, Building Materials, Joinery and Gardens & Landscaping Products | |
| ORDER VALUE | DELIVERY CHARGE |
| Under £300 | £50 ex. VAT |
| Over £300 ex. VAT | £35 ex. VAT |
Returns
We offer a 30 day returns policy on any faulty products.
Key Features
- Polyisocyanurate (PIR) insulation board
- Designed for full fill cavity wall applications
- Low emissivity foil facing for improved thermal performance
- Allows installation with up to 10mm residual cavity
- Ease of installation - accommodates mortar squeeze
Technical Specification
| Material Type: | PIR |
|---|---|
| Thickness: | 115mm |
| Width: | 450mm |
| Length: | 1190mm |
| Pieces Per Pack: | 5 |
| Sales Unit: | Pack |
| Sales Unit Coverage: | 2.68m2 |
| Brand: | Celotex |
| Thermal Conductivity: | 0.021W/mK |
Technical Downloads
What is 115mm Thermaclass Cavity Wall 21?
Discover the versatility and efficiency of 115mm Thermaclass Cavity Wall 21, a specialised polyisocyanurate (PIR) insulation board tailored for full fill cavity wall applications.
This innovative insulation board comes equipped with a low emissivity foil facing, offering the flexibility to install it with up to a 10mm residual cavity, ensuring a smooth installation process and accommodating mortar squeeze.
Alternatively, it can be used as a full fill solution with no residual cavity.
115mm Thermaclass Cavity Wall 21 Applications
- Full fill cavity wall insulation: Ideal for insulating full fill cavity walls, providing excellent thermal performance and energy efficiency.
- Target U-value reduction: Low thermal conductivity of 0.021 W/m.K reduces the thickness of insulation required to achieve the desired U-value in buildings.
- Improved U-value in sealed cavity air spaces: The high-performance facer enhances thermal performance in sealed cavity air spaces, improving achievable U-values (based on a residual cavity of 10mm).
115mm Thermaclass Cavity Wall 21 Benefits
- Excellent thermal performance: With a thermal conductivity of 0.021 W/m.K, Thermaclass Cavity Wall 21 reduces the amount of insulation needed to meet target U-values, enhancing energy efficiency.
- High-performance facer: The low emissivity foil facing improves thermal performance in sealed cavity air spaces, contributing to better achievable U-values.
- Easy installation: Sized to fit standard cavity wall tie spacing, the boards are light and rigid, making transportation, handling, and fitting effortless.
- BBA certified: Thermaclass Cavity Wall 21 has been assessed and certified by the BBA (British Board of Agrément) for use in defined full fill cavity wall applications, ensuring its suitability when installed, used, and maintained according to the certification guidelines.
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